Etymology: Old English ðider , þider , earlier þæder (Lindisfarne ðadder ): corresponding in form to Old Norse þaðra there; < þa- , stem of that pron.¹, adj.¹, adv., and n., the adj., pron.², and n.¹ + suffix, denoting motion towards, Gothic -drē , Vedic -trā : compare hither , Old English hider , Gothic hidrē , and whither , Old English hwider < hwæder , Gothic hwadrē ; a form corresponding to Old English þæder is wanting in Gothic (which uses jaindrē thither, yonder); compare Vedic tatrā there, thither. The Old English þæder , hwæder became þider , hwider , apparently under the influence of hider , hither v., in which the i was original. For the later Middle English -ther for -der in all three words (first in manuscripts of Cursor Mundi, but rare before 1525), as in gather , mother , etc., see th n.¹ (6), and Note s.v. father n. In Scots thidder came down to 1600. The extended Middle English þidere, þidre, was apparently influenced by ordinary adverbs in -e.